| // Copyright 2018 The Abseil Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| // This file declares the subset of the CityHash functions that require |
| // _mm_crc32_u64(). See the CityHash README for details. |
| // |
| // Functions in the CityHash family are not suitable for cryptography. |
| |
| #ifndef ABSL_HASH_INTERNAL_CITY_CRC_H_ |
| #define ABSL_HASH_INTERNAL_CITY_CRC_H_ |
| |
| #include "absl/hash/internal/city.h" |
| |
| namespace absl { |
| namespace hash_internal { |
| |
| // Hash function for a byte array. |
| uint128 CityHashCrc128(const char *s, size_t len); |
| |
| // Hash function for a byte array. For convenience, a 128-bit seed is also |
| // hashed into the result. |
| uint128 CityHashCrc128WithSeed(const char *s, size_t len, uint128 seed); |
| |
| // Hash function for a byte array. Sets result[0] ... result[3]. |
| void CityHashCrc256(const char *s, size_t len, uint64_t *result); |
| |
| } // namespace hash_internal |
| } // namespace absl |
| |
| #endif // ABSL_HASH_INTERNAL_CITY_CRC_H_ |